Not home at the moment but look through the first few posts and pages in this thread. There is info and screen shots.
I am still using v1 drivers (original) and have not updated.
With all the revisions it gets a bit confusing. I believe there was also a 'flash' update as well.
For the original drivers it was just download and install while powered on then reboot. I have used it with various OSs with the same drivers until I settled with it and W8.

okay i just got my audio-gb 11.32... i am using it on windows 8 and the drivers 1.22 which downloaded from audio-gd site... the amp portion is not that loud... my fiio e9 on low gain is louder than the 11.32 on high gain even though i think the amp portion for the 11.32 is about twice as powerful than the fiio... so what is the solution?? or that the warm nature of the 11.32 just makes it seem less loud at full volume? according to the audio-gd site, with asiio there is a sound drop off... i increased the buffer rate to 8192 and the sound volume did increase a bit but i am still confused that why is the fiio e9 louder than an amp twice the power... confuusssiiinnng. Tried it both with he500 and hd650 and fiio e9 is louder on low gain than 11.32 on high gain. Do i need to open something up or what??

well that asio sound drop off was due to performance issues of old computers according to the audio-gd site's install guide... and as far as power is concerned, i think gain is different than pure power according to some people in another thread i was posting...